US20140306435A1 - Diffuser pocket for airbag and method of manufacturing the same - Google Patents
Diffuser pocket for airbag and method of manufacturing the same Download PDFInfo
- Publication number
- US20140306435A1 US20140306435A1 US14/253,913 US201414253913A US2014306435A1 US 20140306435 A1 US20140306435 A1 US 20140306435A1 US 201414253913 A US201414253913 A US 201414253913A US 2014306435 A1 US2014306435 A1 US 2014306435A1
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- Prior art keywords
- gas discharging
- folding
- insertion portion
- folding line
- diffuser pocket
- Prior art date
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- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 238000003780 insertion Methods 0.000 claims abstract description 85
- 230000037431 insertion Effects 0.000 claims abstract description 85
- 238000007599 discharging Methods 0.000 claims abstract description 84
- 239000004744 fabric Substances 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 13
- 238000009958 sewing Methods 0.000 claims description 12
- 230000003014 reinforcing effect Effects 0.000 claims description 8
- 238000005520 cutting process Methods 0.000 claims description 6
- 238000005304 joining Methods 0.000 claims 1
- 230000006378 damage Effects 0.000 abstract description 8
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000003685 thermal hair damage Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000001151 other effect Effects 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/23—Inflatable members
- B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
- B60R21/232—Curtain-type airbags deploying mainly in a vertical direction from their top edge
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
- B60R21/261—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow with means other than bag structure to diffuse or guide inflation fluid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/20—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
- B60R21/213—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in vehicle roof frames or pillars
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/23—Inflatable members
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/23—Inflatable members
- B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
- B60R21/2334—Expansion control features
- B60R21/2346—Soft diffusers
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B23/00—Sewing apparatus or machines not otherwise provided for
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
- B60R21/261—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow with means other than bag structure to diffuse or guide inflation fluid
- B60R2021/2612—Gas guiding means, e.g. ducts
- B60R2021/2617—Curtain bag nozzles
Definitions
- the present invention relates to a diffuser pocket for an airbag, and more particularly, to a diffuser pocket which distributes and supplies high-pressure gas, which is generated from an inflator at the time of a vehicle collision, to an airbag cushion, and a method of manufacturing the same.
- an airbag system is a safety device for an occupant which allows an airbag to be deployed between an occupant and a vehicle structure at the time of a vehicle collision so as to prevent the occupant from directly colliding with the vehicle structure and minimize injury to the occupant.
- the airbag system is installed at each region in the vehicle as necessary, and a driver seat airbag device which is mounted in a steering wheel in order to protect an upper body and a head of the occupant seated on a driver seat at the time of a frontal collision, an passenger set airbag device which is mounted at an upper side of a glove box so as to protect the occupant seated on a passenger seat, and a curtain airbag device which is mounted in a side of the vehicle in order to protect the occupant while being deployed between the occupant and a door at the time of a broadside collision are being used.
- the curtain airbag is installed along a roof rail of a vehicle so as to protect the occupant while being deployed at the time of a broadside collision or an overturn accident after a broadside collision.
- the curtain airbag device uses a steel pipe or a diffuser pocket in order to supply gas produced by the inflator to an airbag cushion, but there are problems in that a design of pattern of the steel pipe is important for leading gas immediately downward from the pipe because gas flows over front and rear sides, and the steel pipe is heavy and expensive.
- the diffuser pocket is formed by folding a predetermined fabric and sewing outer edges of the diffuser pocket, there is a problem in that a sewed portion of the diffuser pocket is damaged due to high-temperature and high-pressure gas injected from an inflator. Particularly, because a lower side of a portion of the diffuser pocket into which a tip portion of the inflator is inserted is sewed, there are problems in that thermal damage occurs through a sewed gap, and the airbag cushion is also damaged.
- the present invention has been made in an effort to provide a diffuser pocket for an airbag, which prevents damage to the diffuser pocket due to high-temperature and high-pressure gas that is injected from an inflator at the time of a vehicle collision, and stably supplies high-pressure gas to an airbag cushion, thereby improving deployment performance of the airbag cushion.
- An exemplary embodiment of the present invention provides a diffuser pocket for an airbag, including: an insertion portion into which at least a tip portion of an inflator, which injects high-pressure gas at the time of a vehicle collision, is inserted; and a gas discharging portion which guides and discharges high-pressure gas injected from the inflator to an airbag cushion,
- the insertion portion may include front and rear insertion surfaces that are folded upward based on a first folding line positioned at a center of the insertion portion, and upper portions of the front and rear insertion surfaces may be joined with each other by an attaching means
- the gas discharging portion may include front and rear gas discharging surfaces that are folded to one side based on a second folding line positioned at a center of the gas discharging portion, the second folding line may form a right line of the gas discharging portion, and upper portions and left portions of the front and rear gas discharging surfaces may be joined with each other by an attaching means.
- a first superposition surface may be positioned between portions where the front insertion surface and the front gas discharging surface overlap each other, and a second superposition surface may be positioned between portions where the rear insertion surface and the rear gas discharging surface overlap each other.
- the diffuser pocket may be made of a single fabric.
- Sewing may be selected as the attaching means.
- the insertion portion may be formed in a quadrangular shape, the first and second superposition surfaces may be formed in a triangular shape, and the gas discharging portion may be formed in a polygonal shape having five vertices or more.
- the first and second superposition surfaces may be positioned between the front and rear insertion surfaces and the front and rear gas discharging surfaces by folding superposition portions positioned between the insertion portion and the gas discharging portion, and the first and second superposition surfaces may be formed by folding a third folding line, which is a left line of the insertion portion, so that a sixth folding line, which is positioned between the first and second folding lines, is in contact with a part of the first folding line, and folding fourth and fifth folding lines that connects portions where front and rear ends of the third folding line are in contact with the second and sixth folding lines.
- a reinforcing fabric which has a gas guide portion that is extended downward from the diffuser pocket, may be coupled to the diffuser pocket, and the gas guide portion may have a lower end that is closed by being sewed, and gas discharging openings that is formed at both sides of the gas guide portion.
- Another exemplary embodiment of the present invention provides a method of manufacturing a diffuser pocket for an airbag, including: a cutting process for cutting a single fabric so as to form an insertion portion into which a tip portion of an inflator is inserted, and a gas discharging portion which is disposed at a left side of the insertion portion so as to guide and discharge high-pressure gas injected from the inflator to an airbag cushion; a folding process for folding the gas discharging portion to a bottom side of the insertion portion based on a folding line that is a left line of the insertion portion, folding front and rear insertion surfaces of the insertion portion upward based on a folding line that is positioned in a horizontal direction at a center of the insertion portion, and folding front and rear gas discharging surfaces of the gas discharging portion to one side based on a folding line that is positioned in a horizontal direction at a center of the gas discharging portion; and a sewing process for sewing upper portions of the front and rear insertion surfaces, and upper portions and
- the insertion portion and the gas discharging portion may be folded so that parts of the insertion portion and the gas discharging portion overlap each other, and the insertion portion and the gas discharging portion may be folded so that a superposition surface is positioned between portions where parts of the insertion portion and the gas discharging portion overlap each other.
- the superposition surface may be positioned between portions where the insertion portion and the gas discharging portion overlap each other, by folding the diffuser pocket based on a folding line that is connected between a folding line positioned at a center of the insertion portion and a folding line positioned at a center of the gas discharging portion, and based on a folding line that is inclinedly connected to front and rear ends of a folding line which is a left line of the insertion portion and a folding line positioned at a center of the gas discharging portion.
- the insertion portion may be formed in a quadrangular shape, and the gas discharging portion may be formed in a polygonal shape having six vertices or more that has a width in a forward and rearward direction wider than that of the insertion portion.
- the diffuser pocket for an airbag and the method of manufacturing the same according to the present invention may improve rigidity of the diffuser pocket, thereby preventing damage to the diffuser pocket and the airbag cushion that may be caused by high-temperature and high-pressure gas injected from the inflator.
- FIG. 1 is a cross-sectional view illustrating a curtain airbag device for a vehicle.
- FIG. 2 is a development view of a diffuser pocket according to a first exemplary embodiment of the present invention.
- FIG. 3 is a view illustrating a sequence of folding the diffuser pocket according to the first exemplary embodiment of the present invention.
- FIG. 4 is a front view of the diffuser pocket according to the first exemplary embodiment of the present invention.
- FIG. 5 is a front view illustrating a state in which an inflator is inserted into the diffuser pocket according to the first exemplary embodiment of the present invention.
- FIG. 6 is a front view of a diffuser pocket according to a second exemplary embodiment of the present invention.
- FIG. 7 is a front view of a diffuser pocket according to a third exemplary embodiment of the present invention.
- FIG. 1 is a cross-sectional view illustrating a curtain airbag device for a vehicle
- FIG. 2 is a development view of a diffuser pocket according to a first exemplary embodiment of the present invention
- FIG. 3 is a view illustrating a sequence of folding the diffuser pocket according to the first exemplary embodiment of the present invention
- FIG. 4 is a front view of the diffuser pocket according to the first exemplary embodiment of the present invention
- FIG. 5 is a front view illustrating a state in which an inflator is inserted into the diffuser pocket according to the first exemplary embodiment of the present invention
- FIG. 6 is a front view of a diffuser pocket according to a second exemplary embodiment of the present invention
- FIG. 7 is a front view of a diffuser pocket according to a third exemplary embodiment of the present invention.
- a curtain airbag device for a vehicle includes an inflator 10 which injects high-pressure gas at the time of a vehicle collision, an airbag cushion 20 which is deployed toward a vehicle side by high-pressure gas that is injected from the inflator 10 and flows into the airbag cushion 20 , and a diffuser pocket 30 which is installed in the airbag cushion 20 and guides high-pressure gas injected from the inflator 10 into the airbag cushion 20 .
- the diffuser pocket 30 includes an insertion portion 40 into which a tip portion of the inflator 10 is inserted, and a gas discharging portion 60 which is positioned at a left lower side of the insertion portion 40 and guides high-pressure gas injected from the inflator 10 to the airbag cushion.
- the insertion portion 40 has front and rear insertion surfaces 41 and 42 that are folded upward along a horizontal first folding line 31 positioned at a center of the insertion portion 40 , upper portions of the front and rear insertion surfaces 41 and 42 are joined with each other by being sewn together 71 , and a first opening portion 30 a for inserting the inflator is formed at a right portion of the insertion portion 40 .
- the gas discharging portion 60 has front and rear gas discharging surfaces 61 and 62 that are folded upward along a horizontal second folding line 33 positioned at a center of the gas discharging portion 60 , the second folding line 33 forms a right line of the gas discharging portion 60 , and upper portions, and side portions, which are positioned to face the second folding line 33 , of the front and rear gas discharging surfaces 61 and 62 are joined with each other by being sewn together 72 , and a second opening portion 60 a for discharging gas is formed at a lower end of the gas discharging portion 60 .
- a first superposition surface 51 is positioned between portions where the front insertion surface 41 and the front gas discharging surface 61 overlap each other, and a second superposition surface 52 is positioned between portions where the rear insertion surface 42 and the rear gas discharging surface 62 overlap each other.
- the first and second superposition surfaces 51 and 52 are formed by folding the diffuser pocket along a third folding line 37 in a forward and rearward direction by which the front and rear insertion surfaces 41 and 42 are in contact with the first and second superposition surfaces 51 and 52 , fourth and fifth folding lines 34 and 35 in an inclined direction by which the front and rear gas discharging surfaces 61 and 62 are in contact with the first and second superposition surfaces 51 and 52 , and a horizontal sixth folding line 32 which is connected between the first and second folding lines 31 and 33 .
- the front and rear insertion surfaces 41 and 42 are formed in a quadrangular shape
- the front and rear gas discharging surfaces 61 and 62 are formed in a polygonal shape having five vertices or more
- the first and second superposition surfaces 51 and 52 are formed in a triangular shape.
- the first, second, and sixth folding lines 31 , 33 , and 32 are positioned in an horizontal straight line, and the third folding line 37 is positioned to be perpendicular to the first folding line 31 .
- the fourth and fifth folding lines 34 and 35 are formed as inclined lines that are connected between both ends of the third folding line 37 and a portion where the second and sixth folding lines 33 and 32 are in contact with each other.
- a single fabric is cut to form the quadrangular insertion portion 40 , and the gas discharging portion 60 that is disposed at a left side of the insertion portion 40 and has a width in forward and rearward directions that is wider than that of the insertion portion 40 .
- the gas discharging portion 60 is folded counterclockwise at an angle of 180° based on the third folding line 37 , which is a folding line in the forward and rearward directions corresponding to a left line of the insertion portion 40 , so as to be in contact with a bottom surface of the insertion portion 40 ( FIG. 3A ).
- the front and rear gas discharging surfaces 61 and 62 are folded to be close to each other at a predetermined angle, based on the fourth and fifth folding lines 34 and 35 , which are inclined to face each other from both the ends of the third folding line 37 toward the inside of a central portion of the gas discharging portion 60 , and the second folding line 33 that is a folding line positioned in a horizontal direction at a center of the gas discharging portion 60 ( FIG. 3B ).
- the front and rear insertion surfaces 41 and 42 are folded upward at an angle of 90° based on the first folding line 31 which is positioned in a horizontal direction at a center of the insertion portion 40 , so that the front and rear insertion surfaces 41 and 42 are in contact with each other, and the front and rear superposition surfaces 51 and 52 are folded upward at an angle of 90° based on the sixth folding line 32 that is a folding line positioned in the horizontal direction between the first folding line 31 and the second folding line 33 (FIG. 3 C).
- the upper portions of the insertion portion 40 which has the front and rear insertion surfaces 41 and 42 , are sewn together 71
- the upper portions and the left portions of the gas discharging portion 60 which has the front and rear gas discharging surfaces 61 and 62 , are sewn together 72 , and as a result, the process of manufacturing the diffuser pocket according to one exemplary embodiment of the present invention is completed.
- the first opening portion 30 a is formed at a right end of the insertion portion 40
- the second opening portion 60 a is formed at a lower end of the gas discharging portion 60 .
- the diffuser pocket is installed in the airbag cushion 20 , and then at least the tip portion of the inflator 10 is inserted into the insertion portion 40 through the first opening portion 30 a.
- the diffuser pocket that is manufactured as described above and installed in the airbag cushion, when high-pressure gas is injected from the inflator 10 at the time of a vehicle collision, the high-pressure gas is discharged into the airbag cushion through the second opening portion 60 a while being guided by the gas discharging portion 60 so that the airbag cushion is deployed.
- the diffuser pocket according to the exemplary embodiment of the present invention, which is configured as described above, the lower portion of the insertion portion 40 at which the first folding line 31 is positioned, and the right portion of the gas discharging portion 60 at which the second folding line 33 is positioned, where a weight of the inflator is concentrated, and thermal damage mainly occurs when high-temperature and high-pressure gas is injected from the inflator 10 , are folded without being sewn, thereby preventing damage due to a leakage of high-temperature and high-pressure gas through a gap formed by sewing thereof.
- a superposition portion 50 is positioned at a boundary between the insertion portion 40 and the gas discharging portion 60 , where the largest amount of thermal damage occurs due to high-temperature and high-pressure gas injected from the inflator, and is reinforced, thereby preventing damage to the boundary.
- a direction in which high-pressure gas injected from the inflator 10 is discharged may be changed by changing an angle of the second folding lines 33 , 33 ′, and 33 ′′ that forms the right line of the gas discharging portion 60 .
- An inclination angle of the right line of the gas discharging portion 60 may be changed by adjusting an angle at which the gas discharging portion 60 is folded.
- An angle at which high-pressure gas is discharged may be adjusted by inclinedly sewing the right portion of the gas discharging portion 60 at a predetermined angle, without changing an angle at which the gas discharging portion is folded.
- the diffuser pocket 30 is enclosed with a reinforcing fabric 80 , thereby reducing damage to the diffuser pocket 30 and the airbag cushion 20 .
- the reinforcing fabric 80 may be made of a strong material in order to prevent damage to the airbag cushion 20 due to high-pressure gas.
- the reinforcing fabric 80 is formed to have a shape similar to that of the diffuser pocket 30 , and the reinforcing fabric 80 and the diffuser pocket 30 are coupled to each other by sewing 81 .
- the reinforcing fabric 80 has a gas guide portion 82 that is formed to be extended downward from the diffuser pocket 30 , and the gas guide portion 82 has a lower end portion that is closed by sewing 82 ′, and discharge openings 80 b and 80 c are formed at both side portions of the gas guide portion 82 , such that high-pressure gas, which is discharged from the second opening portion 60 a of the diffuser pocket, may be discharged while being distributed to both sides of the airbag cushion through both the side portions of the gas guide portion 82 .
- the folding line which has been described above, is a virtual line for explaining a state in which the diffuser pocket according to the present invention is folded, and the folding line is not actually indicated on the diffuser pocket of the present invention, and therefore, whether or not the folding line is present cannot affect the protective scope of the present invention.
- an attaching means for attaching the upper portions of the front and rear insertion surfaces of the present invention and/or the side portions that are disposed at the upper side of the front and rear gas discharging surfaces a sewing method has been exemplified, but other attaching means, for example, an adhesive, may be used.
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Abstract
Description
- The present application claims priority to Korean Patent Application Number 10-2013-0041709 filed Apr. 16, 2013, the entire contents of which the application is incorporated herein for all purposes by this reference.
- The present invention relates to a diffuser pocket for an airbag, and more particularly, to a diffuser pocket which distributes and supplies high-pressure gas, which is generated from an inflator at the time of a vehicle collision, to an airbag cushion, and a method of manufacturing the same.
- In general, an airbag system is a safety device for an occupant which allows an airbag to be deployed between an occupant and a vehicle structure at the time of a vehicle collision so as to prevent the occupant from directly colliding with the vehicle structure and minimize injury to the occupant.
- The airbag system is installed at each region in the vehicle as necessary, and a driver seat airbag device which is mounted in a steering wheel in order to protect an upper body and a head of the occupant seated on a driver seat at the time of a frontal collision, an passenger set airbag device which is mounted at an upper side of a glove box so as to protect the occupant seated on a passenger seat, and a curtain airbag device which is mounted in a side of the vehicle in order to protect the occupant while being deployed between the occupant and a door at the time of a broadside collision are being used.
- The curtain airbag is installed along a roof rail of a vehicle so as to protect the occupant while being deployed at the time of a broadside collision or an overturn accident after a broadside collision.
- The curtain airbag device uses a steel pipe or a diffuser pocket in order to supply gas produced by the inflator to an airbag cushion, but there are problems in that a design of pattern of the steel pipe is important for leading gas immediately downward from the pipe because gas flows over front and rear sides, and the steel pipe is heavy and expensive.
- Because the diffuser pocket is formed by folding a predetermined fabric and sewing outer edges of the diffuser pocket, there is a problem in that a sewed portion of the diffuser pocket is damaged due to high-temperature and high-pressure gas injected from an inflator. Particularly, because a lower side of a portion of the diffuser pocket into which a tip portion of the inflator is inserted is sewed, there are problems in that thermal damage occurs through a sewed gap, and the airbag cushion is also damaged.
- The present invention has been made in an effort to provide a diffuser pocket for an airbag, which prevents damage to the diffuser pocket due to high-temperature and high-pressure gas that is injected from an inflator at the time of a vehicle collision, and stably supplies high-pressure gas to an airbag cushion, thereby improving deployment performance of the airbag cushion.
- Technical problems of the present invention are not limited to the aforementioned technical problems, and other technical problems, which are not mentioned above, may be clearly understood by those skilled in the art from the following descriptions.
- An exemplary embodiment of the present invention provides a diffuser pocket for an airbag, including: an insertion portion into which at least a tip portion of an inflator, which injects high-pressure gas at the time of a vehicle collision, is inserted; and a gas discharging portion which guides and discharges high-pressure gas injected from the inflator to an airbag cushion,
- The insertion portion may include front and rear insertion surfaces that are folded upward based on a first folding line positioned at a center of the insertion portion, and upper portions of the front and rear insertion surfaces may be joined with each other by an attaching means, and the gas discharging portion may include front and rear gas discharging surfaces that are folded to one side based on a second folding line positioned at a center of the gas discharging portion, the second folding line may form a right line of the gas discharging portion, and upper portions and left portions of the front and rear gas discharging surfaces may be joined with each other by an attaching means.
- A first superposition surface may be positioned between portions where the front insertion surface and the front gas discharging surface overlap each other, and a second superposition surface may be positioned between portions where the rear insertion surface and the rear gas discharging surface overlap each other.
- The diffuser pocket may be made of a single fabric.
- Sewing may be selected as the attaching means.
- The insertion portion may be formed in a quadrangular shape, the first and second superposition surfaces may be formed in a triangular shape, and the gas discharging portion may be formed in a polygonal shape having five vertices or more.
- The first and second superposition surfaces may be positioned between the front and rear insertion surfaces and the front and rear gas discharging surfaces by folding superposition portions positioned between the insertion portion and the gas discharging portion, and the first and second superposition surfaces may be formed by folding a third folding line, which is a left line of the insertion portion, so that a sixth folding line, which is positioned between the first and second folding lines, is in contact with a part of the first folding line, and folding fourth and fifth folding lines that connects portions where front and rear ends of the third folding line are in contact with the second and sixth folding lines.
- A reinforcing fabric, which has a gas guide portion that is extended downward from the diffuser pocket, may be coupled to the diffuser pocket, and the gas guide portion may have a lower end that is closed by being sewed, and gas discharging openings that is formed at both sides of the gas guide portion.
- Another exemplary embodiment of the present invention provides a method of manufacturing a diffuser pocket for an airbag, including: a cutting process for cutting a single fabric so as to form an insertion portion into which a tip portion of an inflator is inserted, and a gas discharging portion which is disposed at a left side of the insertion portion so as to guide and discharge high-pressure gas injected from the inflator to an airbag cushion; a folding process for folding the gas discharging portion to a bottom side of the insertion portion based on a folding line that is a left line of the insertion portion, folding front and rear insertion surfaces of the insertion portion upward based on a folding line that is positioned in a horizontal direction at a center of the insertion portion, and folding front and rear gas discharging surfaces of the gas discharging portion to one side based on a folding line that is positioned in a horizontal direction at a center of the gas discharging portion; and a sewing process for sewing upper portions of the front and rear insertion surfaces, and upper portions and left portions of the front and rear gas discharging surfaces.
- In the folding process, the insertion portion and the gas discharging portion may be folded so that parts of the insertion portion and the gas discharging portion overlap each other, and the insertion portion and the gas discharging portion may be folded so that a superposition surface is positioned between portions where parts of the insertion portion and the gas discharging portion overlap each other.
- The superposition surface may be positioned between portions where the insertion portion and the gas discharging portion overlap each other, by folding the diffuser pocket based on a folding line that is connected between a folding line positioned at a center of the insertion portion and a folding line positioned at a center of the gas discharging portion, and based on a folding line that is inclinedly connected to front and rear ends of a folding line which is a left line of the insertion portion and a folding line positioned at a center of the gas discharging portion.
- In the cutting process, the insertion portion may be formed in a quadrangular shape, and the gas discharging portion may be formed in a polygonal shape having six vertices or more that has a width in a forward and rearward direction wider than that of the insertion portion.
- The diffuser pocket for an airbag and the method of manufacturing the same according to the present invention may improve rigidity of the diffuser pocket, thereby preventing damage to the diffuser pocket and the airbag cushion that may be caused by high-temperature and high-pressure gas injected from the inflator.
- The effects of the present invention are not limited to the aforementioned effects, and other effects, which are not mentioned above, will be clearly understood by those skilled in the art from the claims.
-
FIG. 1 is a cross-sectional view illustrating a curtain airbag device for a vehicle. -
FIG. 2 is a development view of a diffuser pocket according to a first exemplary embodiment of the present invention. -
FIG. 3 is a view illustrating a sequence of folding the diffuser pocket according to the first exemplary embodiment of the present invention. -
FIG. 4 is a front view of the diffuser pocket according to the first exemplary embodiment of the present invention. -
FIG. 5 is a front view illustrating a state in which an inflator is inserted into the diffuser pocket according to the first exemplary embodiment of the present invention. -
FIG. 6 is a front view of a diffuser pocket according to a second exemplary embodiment of the present invention. -
FIG. 7 is a front view of a diffuser pocket according to a third exemplary embodiment of the present invention. - Advantages and features of the present invention and methods of achieving the advantages and features will be clear with reference to exemplary embodiments described in detail below together with the accompanying drawings. However, the present invention is not limited to the exemplary embodiments set forth below, and may be embodied in various other forms. The present exemplary embodiments are for rendering the description of the present invention complete and are set forth to provide a complete understanding of the scope of the invention to a person with ordinary skill in the art to which the present invention pertains, and the present invention is defined by the scope of the claims. Like reference numerals indicate like elements throughout the specification.
- Hereinafter, a diffuser pocket for an airbag according to exemplary embodiments of the present invention will be described with reference to the drawings.
-
FIG. 1 is a cross-sectional view illustrating a curtain airbag device for a vehicle,FIG. 2 is a development view of a diffuser pocket according to a first exemplary embodiment of the present invention,FIG. 3 is a view illustrating a sequence of folding the diffuser pocket according to the first exemplary embodiment of the present invention,FIG. 4 is a front view of the diffuser pocket according to the first exemplary embodiment of the present invention,FIG. 5 is a front view illustrating a state in which an inflator is inserted into the diffuser pocket according to the first exemplary embodiment of the present invention,FIG. 6 is a front view of a diffuser pocket according to a second exemplary embodiment of the present invention, andFIG. 7 is a front view of a diffuser pocket according to a third exemplary embodiment of the present invention. - As illustrated in
FIG. 1 , a curtain airbag device for a vehicle includes aninflator 10 which injects high-pressure gas at the time of a vehicle collision, anairbag cushion 20 which is deployed toward a vehicle side by high-pressure gas that is injected from theinflator 10 and flows into theairbag cushion 20, and adiffuser pocket 30 which is installed in theairbag cushion 20 and guides high-pressure gas injected from theinflator 10 into theairbag cushion 20. - As illustrated in
FIGS. 2 to 5 , thediffuser pocket 30 according to a first exemplary embodiment of the present invention includes aninsertion portion 40 into which a tip portion of theinflator 10 is inserted, and agas discharging portion 60 which is positioned at a left lower side of theinsertion portion 40 and guides high-pressure gas injected from theinflator 10 to the airbag cushion. - The
insertion portion 40 has front andrear insertion surfaces first folding line 31 positioned at a center of theinsertion portion 40, upper portions of the front andrear insertion surfaces first opening portion 30 a for inserting the inflator is formed at a right portion of theinsertion portion 40. - The
gas discharging portion 60 has front and reargas discharging surfaces second folding line 33 positioned at a center of thegas discharging portion 60, thesecond folding line 33 forms a right line of thegas discharging portion 60, and upper portions, and side portions, which are positioned to face thesecond folding line 33, of the front and reargas discharging surfaces portion 60 a for discharging gas is formed at a lower end of thegas discharging portion 60. - Meanwhile, a
first superposition surface 51 is positioned between portions where thefront insertion surface 41 and the frontgas discharging surface 61 overlap each other, and asecond superposition surface 52 is positioned between portions where therear insertion surface 42 and the reargas discharging surface 62 overlap each other. - The first and
second superposition surfaces third folding line 37 in a forward and rearward direction by which the front andrear insertion surfaces second superposition surfaces fifth folding lines gas discharging surfaces second superposition surfaces sixth folding line 32 which is connected between the first andsecond folding lines - The front and
rear insertion surfaces discharging surfaces second superposition surfaces - The first, second, and
sixth folding lines third folding line 37 is positioned to be perpendicular to thefirst folding line 31. - The fourth and
fifth folding lines third folding line 37 and a portion where the second andsixth folding lines - Hereinafter, a method of manufacturing the
diffuser pocket 30, which is formed as described above, will be described with reference toFIGS. 2 to 4 . - As illustrated in
FIG. 2 , a single fabric is cut to form thequadrangular insertion portion 40, and thegas discharging portion 60 that is disposed at a left side of theinsertion portion 40 and has a width in forward and rearward directions that is wider than that of theinsertion portion 40. - The
gas discharging portion 60 is folded counterclockwise at an angle of 180° based on thethird folding line 37, which is a folding line in the forward and rearward directions corresponding to a left line of theinsertion portion 40, so as to be in contact with a bottom surface of the insertion portion 40 (FIG. 3A ). - Thereafter, the front and rear
gas discharging surfaces fifth folding lines third folding line 37 toward the inside of a central portion of thegas discharging portion 60, and thesecond folding line 33 that is a folding line positioned in a horizontal direction at a center of the gas discharging portion 60 (FIG. 3B ). - In the state illustrated in
FIG. 3B , the front andrear insertion surfaces first folding line 31 which is positioned in a horizontal direction at a center of theinsertion portion 40, so that the front andrear insertion surfaces rear superposition surfaces sixth folding line 32 that is a folding line positioned in the horizontal direction between thefirst folding line 31 and the second folding line 33 (FIG. 3C). - After folding the single fabric, the upper portions of the
insertion portion 40, which has the front andrear insertion surfaces gas discharging portion 60, which has the front and reargas discharging surfaces - Meanwhile, the first opening
portion 30 a is formed at a right end of theinsertion portion 40, and thesecond opening portion 60 a is formed at a lower end of thegas discharging portion 60. - The diffuser pocket is installed in the
airbag cushion 20, and then at least the tip portion of theinflator 10 is inserted into theinsertion portion 40 through thefirst opening portion 30 a. - According to the diffuser pocket that is manufactured as described above and installed in the airbag cushion, when high-pressure gas is injected from the
inflator 10 at the time of a vehicle collision, the high-pressure gas is discharged into the airbag cushion through the second openingportion 60 a while being guided by thegas discharging portion 60 so that the airbag cushion is deployed. - According to the diffuser pocket according to the exemplary embodiment of the present invention, which is configured as described above, the lower portion of the
insertion portion 40 at which thefirst folding line 31 is positioned, and the right portion of thegas discharging portion 60 at which thesecond folding line 33 is positioned, where a weight of the inflator is concentrated, and thermal damage mainly occurs when high-temperature and high-pressure gas is injected from the inflator 10, are folded without being sewn, thereby preventing damage due to a leakage of high-temperature and high-pressure gas through a gap formed by sewing thereof. - Particularly, according to the diffuser pocket, a
superposition portion 50 is positioned at a boundary between theinsertion portion 40 and thegas discharging portion 60, where the largest amount of thermal damage occurs due to high-temperature and high-pressure gas injected from the inflator, and is reinforced, thereby preventing damage to the boundary. - According to a second exemplary embodiment of the present invention, which is illustrated in
FIG. 6 , a direction in which high-pressure gas injected from the inflator 10 is discharged may be changed by changing an angle of thesecond folding lines gas discharging portion 60. - An inclination angle of the right line of the
gas discharging portion 60 may be changed by adjusting an angle at which thegas discharging portion 60 is folded. - An angle at which high-pressure gas is discharged may be adjusted by inclinedly sewing the right portion of the
gas discharging portion 60 at a predetermined angle, without changing an angle at which the gas discharging portion is folded. - According to a third exemplary embodiment of the present invention, which is illustrated in
FIG. 7 , thediffuser pocket 30 is enclosed with a reinforcingfabric 80, thereby reducing damage to thediffuser pocket 30 and theairbag cushion 20. - The reinforcing
fabric 80 may be made of a strong material in order to prevent damage to theairbag cushion 20 due to high-pressure gas. - The reinforcing
fabric 80 is formed to have a shape similar to that of thediffuser pocket 30, and the reinforcingfabric 80 and thediffuser pocket 30 are coupled to each other by sewing 81. - The reinforcing
fabric 80 has agas guide portion 82 that is formed to be extended downward from thediffuser pocket 30, and thegas guide portion 82 has a lower end portion that is closed by sewing 82′, anddischarge openings gas guide portion 82, such that high-pressure gas, which is discharged from thesecond opening portion 60 a of the diffuser pocket, may be discharged while being distributed to both sides of the airbag cushion through both the side portions of thegas guide portion 82. - The folding line, which has been described above, is a virtual line for explaining a state in which the diffuser pocket according to the present invention is folded, and the folding line is not actually indicated on the diffuser pocket of the present invention, and therefore, whether or not the folding line is present cannot affect the protective scope of the present invention.
- As an attaching means for attaching the upper portions of the front and rear insertion surfaces of the present invention and/or the side portions that are disposed at the upper side of the front and rear gas discharging surfaces, a sewing method has been exemplified, but other attaching means, for example, an adhesive, may be used.
- Directional terms, which has been described in the present invention, for example, front and rear, upper and lower, and left and right, may be varied in accordance with an angle at which the diffuser pocket is viewed, and therefore the directional terms cannot limit the protective scope of the present invention.
- While the exemplary embodiments of the present invention have been illustrated and described above, the present invention is not limited to the aforementioned specific exemplary embodiments, various modifications may be made by a person with ordinary skill in the art to which the present invention pertains without departing from the subject matters of the present invention that are claimed in the claims, and these modifications should not be appreciated individually from the technical spirit or prospect of the present invention.
Claims (14)
Applications Claiming Priority (2)
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KR10-2013-0041709 | 2013-04-16 | ||
KR1020130041709A KR102027924B1 (en) | 2013-04-16 | 2013-04-16 | The Curtain air bag of a vehicle |
Publications (2)
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US20140306435A1 true US20140306435A1 (en) | 2014-10-16 |
US9393928B2 US9393928B2 (en) | 2016-07-19 |
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US14/253,913 Active 2034-07-13 US9393928B2 (en) | 2013-04-16 | 2014-04-16 | Diffuser pocket for airbag and method of manufacturing the same |
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US (1) | US9393928B2 (en) |
KR (1) | KR102027924B1 (en) |
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Also Published As
Publication number | Publication date |
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KR20140124232A (en) | 2014-10-24 |
US9393928B2 (en) | 2016-07-19 |
KR102027924B1 (en) | 2019-10-02 |
CN104108367B (en) | 2017-04-12 |
CN104108367A (en) | 2014-10-22 |
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